Browsing by Subject "Mississippi River."
Now showing items 1-9 of 9
-
The biomass and productivity of aquatic macrophytes in Navigation Pool 8 of the Upper Mississippi River
(1976-12)The biomass of aquatic macrophytes in Navigation Pool 8 of the Upper Mississippi River was determined in order to provide basic data on the productivity, frequency, and distribution of these plants. Two 0.25 m2 quadrats ... -
A comparison study of the nitrogen and phosphorous concentrations in the Mississippi, Nelson and Niobrara River basins
(1975-12)It has been hypothesized that the absolute quantities of nitrogen and phosphorous in the Upper Mississippi River Basin are higher than they normally would be without the influence of man's activities and without the presence ... -
Computer aided analysis of the backwater rehabilitation of Weaver Bottoms (Pool 5, Upper Mississippi River) / impacts on nursery habitat
(1986-05)Rehabilitation of riverine backwaters has become a major issue on the Upper Mississippi River (UMR), but little data are available to evaluate the effects of proposed modifications on fish nursery habitat. This study was ... -
Distribution and enrichment of trace metals (Cd, Cr, Cu, Ni, Pb, Zn) in bottom sediments of navigation pools 4 (Lake Pepin), 5, and 9 of the Upper Mississippi River
(1983-05)Surficial sediments from Navigation Pools 4 (ALP and LP) 5 (Weaver Bottoms) and 9, and sediment cores from lake Pepin were collected during 1979-1981. Sediment analyses were used to evaluate trace metal (Cd, Cr, Cu, Ni, ... -
Habitat utilization by cyprinids in a backwater area of Navigation Pool 7, Upper Mississippi River, 1982
(1984-05)The distribution and feeding patterns of several species of cyprinids were examined to determine the means by which partitioning of resources occured. -
Importance of aquatic invertebrates as fish food in selected areas of the upper Mississippi River
(1974-05)Food habits of bluegills (Lepomis macrochirus Rafinesque) largemouth bass (Micropterus salmoides Lacepede), and spotted suckers (Minytrema melanops Rafinesque) were investigated to determine their dependence on the zooplankton ... -
The interactive effects of deer herbivory and flooding on tree recruitment in floodplain forests of the Upper Mississippi River system
(2011-12)Floodplain forests are a critical link between land and river ecosystems, moderating nutrient fluxes, providing animal habitat, and stabilizing the river corridor. In the Upper Mississippi River (UMR), floodplain tree ... -
Reproductive biology of three freshwater mussels (Bivalvia:unionidae) and incidence of parasitic glochidia on fishes in Navigation Pool 7 of the Upper Mississippi River with observations of host specificity of Lampsilis ventricosa (Barnes, 1823)
(1986-07)Three species of adult freshwater unionid mussels were examined for reproductive development on about a weekly basis from May 1982 through October 1982 and during Apri 1 1983 in Pool 7 of the Upper Mississippi River. -
Reproductive biology, growth, and verification of three fish hosts of Magnonaias nervosa (Rafinesque, 1820) (Bivalvia: Unionidae) in the east channel of navigation pool 10, Upper Mississippi River
(1988-04)Gametogenic development of Magnonaias nervosa (Bivalvia: Unionidae) was examined monthly from April 1986 to March 1987 in Navigation Pool 10 of the Upper Mississippi River. This species attains sexual maturity at a shell ...